Answer: The correct option is D: they used rivers and bodies of water for food and for trade.
Explanation: A clear example is the Nile River, the main tributary that bordered these two important civilizations since the fertile lands near the Nile, allowed them to plant wheat, barley, some fruit and vegetable species, which were products of great agricultural importance The Nile River was also important because it is the main route for the transport of people and goods and for the settlement of various Egyptian and Mesopotamian peoples.
